IC-MHL200 Datasheet, PDF (26/33 Pages) IC-Haus GmbH – 12-BIT LINEAR / ROTARY POSITION HALL ENCODER

iC-MHL200
12-BIT LINEAR / ROTARY POSITION HALL ENCODER
Rev C1, Page 26/33
The property of the RS422 driver of the connected line
can be adjusted in the CFGDR register.
CFGDR(1:0)
Addr. 0x05; bit 1:0
Value
Function
0x00
10 MHz, 4 mA (default)
0x01
10 MHz, 60 mA
0x10
300 kHz, 60 mA
0x11
3 MHz, 20 mA
Table 26: Driver property
Signals with the highest frequency can be transmitted
in the setting CFGDR = 00. The driver capability is at
least 4 mA, however it is not designed for a 100 Ω line.
This mode is ideal for connection to a digital input on
the same assembly. With the setting CFGDR = 01 the
same transmission speed is available and the driver
power is sufficient for the connection of a line over a
short distance. Steep edges on the output enable a
high transmission rate. A lower slew rate is offered by
the setting CFGDR = 10, which is excellent for longer
lines in an electromagnetically sensitive environment.
Use of the setting CFGDR = 11 is advisable at medium
transmission rates with a limited driver capability.
TRIHL
Value
0x00
0x01
0x10
0x11
Addr. 0x05; bit 3:2
Function
Push pull output stage
Low-side driver
High-side driver
Tristate
Table 27: Tristate Register
The drivers consist of a push-pull stage in each case
with low-side and high-side drivers which can each be
activated individually. As a result, open-drain outputs
with an external pull-up resistor can also be realized.
BiSS INTERFACE
The BiSS interface with the BiSS C protocol is used to module. For a detailed description of the BiSS protocol,
read out the absolute position and to parameterize the see separate BiSS C protocol specification.
MA
SLI
SLO
CDM
Ack Start CDS D11 D10
D0 nE nW CRC5 CRC4
Data Range
Figure 27: BiSS C Interface Protocol
CRC0 Stop
Timeout
The sensor sends a fixed cycle-start sequence con-
taining the acknowledge-, start and control-bit followed
by the binary 12 bit sensor data. At lower resolution
settings the data word contains leading zeros. The
low-active error bit nE a 0 indicates an error which can
be further identified by reading the status register 0x77.
The following bit nW is always at 1 state. Following the
6 CRC bits the data of the next sensors, if available,
are presented. Otherwise, the BiSS master stops gen-
erating clock pulse on the MA line an the sensor runs
into a timeout, indicating the end of communication.
Serial Protocol
Content
Cycle start sequence
Length of sensor data
CRC polynomial
CRC mode
max. data rate
BiSS C
Ack/Start/CDS
12 bit + ERR + WARN
0b1000011
inverted
10 MHz
Table 28: BiSS C Protocol
ENSSI
Value
0x0
0x1
Addr. 0x05; bit 7
Interface
BiSS C protocol
SSI-Mode
Table 29: Activation of SSI mode